None of the students watched the teacher.A. careful enoughB. enough carefullyC. carefully

问题补充：

None of the students watched the teacher.

A. careful enough

B. enough carefully

C. carefully enough

D. enough careful

答案：

A. careful enough

B. enough carefully

(答案→)C. carefully enough

D. enough careful

解析： enough作为副词，在修饰副词，形容词时要后置。